Hi all,
One of the nice CAPTCHAs I have seen are text based simple logical questions used on Web Accessibility Guidelines portal of Government of India - See http://web.guidelines.gov.in/registration.php Here they ask simple question where answer is available in thequestion itself and very little thinking is required. Questions like "In the following list, which appears first: 29, 127, 234" Also, this should work for refreshable Braille display users too.
While writing this post, I see Government of India Portal Feedback page<http://india.gov.in/feedback_next.php> and they are providing audio captcha that needs to be downloaded. Although the sound quality is good, not sure, if this could be a recomended method. Please comment.
Thx,
-Vasu
srinivasu
chakravarthula
senior manager, inclusive design
Let's create an inclusive world!
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From: Mario Batusic [mailto:Mario.Batusic@jku.at]
Sent: Friday, November 18, 2011 2:52 AM
To: Karl Groves; Phill Jenkins
Cc: Denis Boudreau; Patrick H. Lauke; w3c-wai-ig@w3.org
Subject: Antw: Re: Example of accessible CAPTCHAS that work well
Hi!
Short time ago I found a CMS Drupal module with a very nice captcha implementation. This one lets the users unbothered. The idea is simple: in the form there is an additional field for this fake captcha. The field is hidden from the user in the CSS. The normal bots ignore CSS and fill all fields with some garbage. If the submitted form check finds the hidden field filled with data, the form is discarded.
Ciao Mario
>>> Karl Groves <karl@karlgroves.com> schrieb am 17.11.11 um 21:52 in Nachricht <CABScKPAcc26E5rsdZ+FpTLyLrMX4Z-9FkwUVPhYg5wPvTMrbrg@mail.gmail.com>:
The Smashing Magazine article cited by Phil and Jennifer is a good one
and one which should be shared among those who advocate for CAPTCHA.
I question whether many of the so-called alternatives are truly
alternative in security. I think the article is honest regarding each
method's strength and weaknesses.
As a developer myself, fighting spam and abuse is an ongoing battle
that most people (even most web designers) really know little about.
I've worked with clients whose sites get 10,000 pageviews per second.
Companies like that are under constant barrage from people trying to
gain illegitimate access to their resources. We need to keep this in
mind when discussing potential alternatives to CAPTCHA.
I'm by no means an advocate for CAPTCHA. I don't use it and never
have. But we need to keep in mind that some so-called "alternatives"
really are not alternative in terms of security, and any proposed
alternative should offer an equivalent level of security while also
being accessible.
Karl
On Thu, Nov 17, 2011 at 2:24 PM, Phill Jenkins <pjenkins@us.ibm.com> wrote:
> This March 2011 article is worth reading
> http://coding.smashingmagazine.com/2011/03/04/in-search-of-the-perfect-captcha/
>
> several alternatives to CAPTCHAS discussed.
>
> Regards,
> Phill Jenkins,
>
>
>
>
>
> From: Denis Boudreau <dboudreau@accessibiliteweb.com>
> To: "Patrick H. Lauke" <redux@splintered.co.uk>
> Cc: w3c-wai-ig@w3.org
> Date: 11/17/2011 12:39 PM
> Subject: Re: Example of accessible CAPTCHAS that work well
> ________________________________
>
>
> Hello all,
>
> On 2011-11-17, at 12:24 PM, Patrick H. Lauke wrote:
>
>> On 17/11/2011 16:12, Ginger Claassen wrote:
>>> Regarding accessible CAPTCHAS I found a very few so far where one has to
>>> solve a very simple mathmatical question e.g. How much is 3 + 4?
>>> In my opinion that is quite accessible or do I oversee something here?
>>
>> Could it pose problems for users with cognitive disabilities? And
>> generally just weird out users ("why is this website asking me this?") and
>> require lengthy explanation? My mum would be left wondering, anyway...
>
> Not only that, but the easier those equations are, the easier bots can crack
> them too. So we're rapidly back to square one.
>
> /Denis
>
>
>
>